Scene elements

All the scene elements that make up the scene graph. More...

Modules
	Miscellaneous
	Miscellaneous scene graph elements, for example, textures, light profiles, BSDF measurements, or decals.
	MDL-related elements
	MDL-related elements comprise a set of interfaces related to the Material Definition Language (MDL).

Classes
class	mi::neuraylib::IAttribute_set
	The attribute set comprises all attributes attached to a database element. More...
class	mi::neuraylib::IScene_element
	Common base interface for all scene elements. More...

Enumerations
enum	mi::neuraylib::Propagation_type {   mi::neuraylib::PROPAGATION_STANDARD ,   mi::neuraylib::PROPAGATION_OVERRIDE ,   PROPAGATION_FORCE_32_BIT = 0xffffffffU }
	Propagation types for attribute inheritance. More...
enum	mi::neuraylib::Element_type {   mi::neuraylib::ELEMENT_TYPE_LIGHTPROFILE = 5 ,   mi::neuraylib::ELEMENT_TYPE_TEXTURE = 7 ,   mi::neuraylib::ELEMENT_TYPE_IMAGE = 8 ,   mi::neuraylib::ELEMENT_TYPE_MODULE = 29 ,   mi::neuraylib::ELEMENT_TYPE_FUNCTION_DEFINITION = 30 ,   mi::neuraylib::ELEMENT_TYPE_FUNCTION_CALL = 31 ,   mi::neuraylib::ELEMENT_TYPE_COMPILED_MATERIAL = 34 ,   mi::neuraylib::ELEMENT_TYPE_BSDF_MEASUREMENT = 35 ,   ELEMENT_TYPE_FORCE_32_BIT = 0xffffffffU }
	Distinguishes scene elements. More...

Functions
template<class T>
mi::Sint32	mi::set_value (mi::neuraylib::IAttribute_set *attribute_set, const char *name, const T &value)
	Simplifies setting the value of an attribute from the corresponding classes from the base and math API. More...
template<class T>
mi::Sint32	mi::set_value (mi::neuraylib::IAttribute_set *attribute_set, const char *name, mi::Size index, const T &value)
	Simplifies setting the value of an attribute from the corresponding classes from the base and math API (variant with an index for collections). More...
template<class T>
mi::Sint32	mi::set_value (mi::neuraylib::IAttribute_set *attribute_set, const char *name, const char *key, const T &value)
	Simplifies setting the value of an attribute from the corresponding classes from the base and math API (variant with a key for collections). More...
template<class T>
mi::Sint32	mi::get_value (const mi::neuraylib::IAttribute_set *attribute_set, const char *name, T &value)
	Simplifies reading the value of an attribute into the corresponding classes from the base and math API. More...
template<class T>
mi::Sint32	mi::get_value (const mi::neuraylib::IAttribute_set *attribute_set, const char *name, mi::Size index, T &value)
	Simplifies reading the value of an attribute into the corresponding classes from the base and math API (variant with an index for collections). More...
template<class T>
mi::Sint32	mi::get_value (const mi::neuraylib::IAttribute_set *attribute_set, const char *name, const char *key, T &value)
	Simplifies reading the value of an attribute into the corresponding classes from the base and math API (variant with a key for collections). More...

Detailed Description

All the scene elements that make up the scene graph.

Enumeration Type Documentation

Element_type

enum mi::neuraylib::Element_type

Distinguishes scene elements.

See also

mi::neuraylib::IScene_element::get_element_type()

Enumerator
ELEMENT_TYPE_LIGHTPROFILE	mi::neuraylib::ILightprofile
ELEMENT_TYPE_TEXTURE	mi::neuraylib::ITexture
ELEMENT_TYPE_IMAGE	mi::neuraylib::IImage
ELEMENT_TYPE_MODULE	mi::neuraylib::IModule
ELEMENT_TYPE_FUNCTION_DEFINITION	mi::neuraylib::IFunction_definition
ELEMENT_TYPE_FUNCTION_CALL	mi::neuraylib::IFunction_call
ELEMENT_TYPE_COMPILED_MATERIAL	mi::neuraylib::ICompiled_material
ELEMENT_TYPE_BSDF_MEASUREMENT	mi::neuraylib::IBsdf_measurement

Propagation_type

enum mi::neuraylib::Propagation_type

Propagation types for attribute inheritance.

Inheritance of attributes allows you to easily make changes to an entire subtree of the scene graph.

Assume the scene graph contains an inner node P (the parent) with a (possibly inherited) attribute A and a child node C. If the child node C does not have the attribute A, the child will inherit P's value of A (without actually storing an explicit copy). If the child node C has the attribute A, it will use its own value of the attribute without taking P's value into consideration. This is the standard propagation rule which is represented by the propagation type mi::neuraylib::PROPAGATION_STANDARD.

The outcome of the last case can be reverted by setting the override flag of the attribute A on the parent node (or at the node from where it was inherited to P): in this case P's value of A is inherited to the child node C, no matter whether the child has the attribute or not. This propagation mode is represented by mi::neuraylib::PROPAGATION_OVERRIDE.

Note

There is one exception to these rules: If the child node C is a geometry object, then P's value of A is used, no matter whether the propagation mode was set to mi::neuraylib::PROPAGATION_OVERRIDE or mi::neuraylib::PROPAGATION_STANDARD. The rationale is that for geometry objects the attribute on the object itself should be a default that is only used if no value for that attribute is inherited.

Inherited attributes are made available to the render modes, but are not available via the MDL SDK API.

See also

mi::neuraylib::IAttribute_set::set_attribute_propagation()

mi::neuraylib::IAttribute_set::get_attribute_propagation()

Enumerator
PROPAGATION_STANDARD	Standard inheritance of attributes without any special flags.
PROPAGATION_OVERRIDE	The override flag for attribute inheritance.

Function Documentation

get_value() [1/3]

template<class T>

mi::Sint32 mi::get_value	(	const mi::neuraylib::IAttribute_set *	attribute_set,
		const char *	name,
		const char *	key,
		T &	value
	)

Simplifies reading the value of an attribute into the corresponding classes from the base and math API (variant with a key for collections).

Parameters

attribute_set	The affected attribute set.
name	The name of the attribute to read.
key	The key of the affected collection element.
value	The new value will be stored here.

Returns

• 0: Success.
• -1: The dynamic type of the attribute does not match the static type of value.
• -3: The key is not valid.
• -4: The attribute name does not exist.

get_value() [2/3]

template<class T>

mi::Sint32 mi::get_value	(	const mi::neuraylib::IAttribute_set *	attribute_set,
		const char *	name,
		mi::Size	index,
		T &	value
	)

Simplifies reading the value of an attribute into the corresponding classes from the base and math API (variant with an index for collections).

Parameters

attribute_set	The affected attribute set.
name	The name of the attribute to read.
index	The index of the affected collection element.
value	The new value will be stored here.

Returns

• 0: Success.
• -1: The dynamic type of the attribute does not match the static type of value.
• -3: The index is not valid.
• -4: The attribute name does not exist.

get_value() [3/3]

template<class T>

mi::Sint32 mi::get_value	(	const mi::neuraylib::IAttribute_set *	attribute_set,
		const char *	name,
		T &	value
	)

Simplifies reading the value of an attribute into the corresponding classes from the base and math API.

Parameters

attribute_set	The affected attribute set.
name	The name of the attribute to read.
value	The new value will be stored here.

Returns

• 0: Success.
• -1: The dynamic type of the attribute does not match the static type of value.
• -4: The attribute name does not exist.

set_value() [1/3]

template<class T>

mi::Sint32 mi::set_value	(	mi::neuraylib::IAttribute_set *	attribute_set,
		const char *	name,
		const char *	key,
		const T &	value
	)

Simplifies setting the value of an attribute from the corresponding classes from the base and math API (variant with a key for collections).

Parameters

attribute_set	The affected attribute set.
name	The name of the attribute to modify.
key	The key of the affected collection element.
value	The new value to be set.

Returns

• 0: Success.
• -1: The dynamic type of the attribute does not match the static type of value.
• -2: The value of value is not valid.
• -3: The key is not valid.
• -4: The attribute name does not exist.

set_value() [2/3]

template<class T>

mi::Sint32 mi::set_value	(	mi::neuraylib::IAttribute_set *	attribute_set,
		const char *	name,
		const T &	value
	)

Simplifies setting the value of an attribute from the corresponding classes from the base and math API.

Parameters

attribute_set	The affected attribute set.
name	The name of the attribute to modify.
value	The new value to be set.

Returns

• 0: Success.
• -1: The dynamic type of the attribute does not match the static type of value.
• -2: The value of value is not valid.
• -4: The attribute name does not exist.

set_value() [3/3]

template<class T>

mi::Sint32 mi::set_value	(	mi::neuraylib::IAttribute_set *	attribute_set,
		const char *	name,
		mi::Size	index,
		const T &	value
	)

Simplifies setting the value of an attribute from the corresponding classes from the base and math API (variant with an index for collections).

Parameters

attribute_set	The affected attribute set.
name	The name of the attribute to modify.
index	The index of the affected collection element.
value	The new value to be set.

Returns

• 0: Success.
• -1: The dynamic type of the attribute does not match the static type of value.
• -2: The value of value is not valid.
• -3: The index is not valid.
• -4: The attribute name does not exist.